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460 kHz, 470kHz, 455 kHz, . . .
Jake Blake
Banned
Posts: 816
Threads: 25
Joined: Mar 2014
City: Louisville, KY
#1

04-15-2019, 03:10 PM
I have a question.

I really don't understand well, the workings of the tuner section of a radio, so I'm not sure my question is even at all important.

But anyways here goes :

What is the significance of the changes to  intermediate frequencies during the 30s?
My research reveals it  started out  at 460kHz, then went to 470 kHz in 1937, . . . stayed there for a few years.  Then it dropped to 455kHz in 1940, where it stayed for the remainder of AM broadcast history. Icon_think
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460 kHz, 470kHz, 455 kHz, . . . - by Jake Blake - 04-15-2019, 03:10 PM
RE: 460 kHz, 470kHz, 455 kHz, . . . - by 35Z5 - 04-15-2019, 06:23 PM



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  1. The PHILCO Phorum
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  3. Philco Home Radios